DME University

Molding Internal Threads Summary

There are many different designs and methods used for unscrewing style molds. How complicated the design becomes is dependent upon:

  1. The thread form, shape, number of cavities, and mold life.
  2. The core and drive design used.
  3. The power required.

A typical unscrewing mold design is a rack and pinion drive. A power source is used to push/pull the rack that unscrews a threaded core and then ejection takes place.

Another method used to mold internal threads, protrusions, dimples, interrupted threads, and cut outs is the collapsible core. After the core collapses the molded art can be ejected.


Next Section

Page 4 of 4

Share On Linkedin